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Finding the Fourth Proportional to 138,408, 207,626.58 and 63,515.40

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Solution

The fourth proportional to 138,408, 207,626.58 and 63,515.40 is: 95,279.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,408 : 207,626.58 = 63,515.40 : x
  2. Step 2: Convert to fraction form
    138,408/207,626.58 = 63,515.40/x
  3. Step 3: Cross multiply
    138,408x = 207,626.58 × 63,515.40
  4. Step 4: Simplify right side
    138,408x = 13,187,485,279.33
  5. Step 5: Solve for x
    x = 13,187,485,279.33/138,408
  6. Step 6: Final answer
    x = 95,279.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.